Imaging Procedures-Test #5 (genetics/blood)

Single gene disorder

Is PKU a single gene disorder or a chromosomal disease

PKU is the absence of certain enzymes that break down phenylalanine. Phenylalanine builds up in the CNS tissue and destroys brain tissue. A symptom is excess phenylalanine in the urine and is treated by diet

what is PKU and how is it treated

21st pair of chromosomes, nondisjunction of the 21st pair

what chromosomes pair contains the traits for down syndrome? what condition causes down syndrome?

chromosomal and is caused by nondisjunction leading to trisomy

is down syndrome a single gene disorder or chromosomal disease?

23rd pair. sex chromosomes, caused by nondisjunction in the x chromosome leading to monosomy XO . occurs in females and is a chromosomal disease

what chromosome pair contains the trait for turner syndrome? what condition cause turner syndrome? single or chromosomal disease?

23rd pair sex chromosomes, caused by nondisjunction in the X chromosome leading to trisomy XXY. chromosomal disease

what chromosome pair contains the trait for Klinefelter syndrome? what condition causes Klinefelter and is it single or chromosomal disease

any of chromosome pairs 1-22

what is an autosome

crossing over, independent assortment and mutations

what are three events that contribute to genetic diversity

chloride channels malfunction leading to buildup of thick mucous secretions in the GI tract and respiratory system, it is single gene disorder chromosome 7

characteristics of cystic fibrosis? is it single or chromosomal disorder?

using viruses as carriers normal genes are introduced with the goal of altering abnormal cells. the aim is for the normal genes to override the abnormal cells and begin to produce proper enzymes

how does gene replacement therapy work

normal genes are introduced in hope that they will add to the production of needed proteins

how does gene augmentation work

improper division during meiosis resulting in monosomy or trisomy

what is non-disjunction

during meiosis a section of chromatin strand crosses with another exchanging genes or whole sections of the arm

what is crossing over

father is able to pass on the Y gene while mother can only pass on the X

which parent determines anoffsprings sex